<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
    <head>
        <script type="text/javascript">
            function setCookie ( c_name, value, expiredays ){
                var exdate = new Date( );
                exdate.setDate( exdate.getDate() + expiredays );
                document.cookie = c_name + "=" + escape( value ) + ( ( expiredays==null  )? "":";expires=" + exdate.toUTCString());
            }

function getCookie( c_name ){
    if ( document.cookie.length > 0 ) {
        c_start = document.cookie.indexOf( c_name + "=" );
        if ( c_start != -1 ){
            c_start = c_start + c_name.length + 1;
            c_end = document.cookie.indexOf( ";", c_start );
            if ( c_end == -1 ) c_end = document.cookie.length;
            return unescape( document.cookie.substring( c_start,c_end ) );
        }
    }
    return "";
}

function checkCookie (  ){
    username = getCookie( 'username' );
    if ( username!=null && username !="" ){
        alert( "Welcome back!" + username + "!" );
    }
    else {
        username = prompt ( 'Please enter your name @:', "" );
        if ( username!=null && username!="" ){
            setCookie( 'username',username,10 );
        }
    }
}
</script>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<title></title>
</head>
<body onload="checkCookie()">

</body>
</html>
